dieteich



(No Model.)

J. G. DIETRIOH.

THILL OOUPLING..

No. 297,356. Patented Apr. 22, 1884.

Irv/enter.

Wit-nus es N. PETER$ mwmm n m. Washington. I10.

NITED STATES ATENT Fries.

THlLL-COUPLING.

SPECIFICATION forming part of Letters Patent No. 297,356, dated April22, 1884.

Application filed July 18, 1883. (N0 model.)

To all'whom, it may conceive-.-

Be it known that I, JEROME COLWELL DIETRICH, of the town of Galt, in thecounty of Waterloo, in the Province of Ontario, Canada, manulacturer,have invented certain new and useful Improvements on Thill-Oouplings, ofwhich the following is a specification.

My invention relates to that class of thillcoupliugs in which the thillhas a hooked end to lit over the bolt passing through the drawjack, andprovided with a spring to keep it in position.

It consists in the peculiar construction, arrangement, and combinationof parts, as hereinafter more fully described and claimed.

Figure l is a perspective view, showing my improved thill-couplingcomplete. Fig. 2 is a detailed view of the clip and jaws. Fig. 3 is adetailed view oft-he spring-plate. Fig. 4 is a vertical cross-section.

A is the ordinary draw-jack, held to the axle in the usual manner, andhaving a bolt or pin, B, passing through its jaws.

(J is ahooked end of a thill, curved and otherwise shaped, as shown, tofit over the bolt B between the jaws of the draw-jack, as inclicated. Itwill be noticed that the point a of the thill isthickened. so as to forman enlargement which will prevent it entering a passage through whichthe other portion of the hook may easily be moved.

D is a looped spring-plate, designed to fit between the jaws of thedraw-jack A behind the hooked end of the thill C. The loop of thisplate, it will be noticed, is curved so as to extend over the top of thethill, in order to press the thill firmly and yet easily against itsbearing-bolt B.

E is a pin formed on the draw-jack A, and designed to fit into the holeE made in the plate when the said plate has been pressed home. It willof course be understood that exactly the same effect would be producedby forming the pin E on the plate D, the hole in this case being ofcourse made in the drawjack; or an indentation might be made either inthe plate or in the face of the draw-jack, to receive a projectionformed on either the plate or draw-jack, as the case may be, the soleobject being to form a snap-catch'for retaining the spring-plat'einposition. It will be noticed that in the drawings the surface of thedrawjack, against which the spring-plate presses, is made at about rightangles to the center line of the draw-jack. This form of drawjack givesample surface against which the plate may press.v It will also benoticed that the spring presses on the upper part of the hooked end ofthe thill, whereby the thill is more securely held in place, and thatowing to the peculiar formation of the spring it is only necessary topress on its upper portion with the thumb, when it can be released fromthe pin E and readily taken out, so that the thill can be readilyremoved when necessary. I am aware of Patents Nos. 45,519, 196,177, and229,470, and make no claim to the construction shown therein.

What I claim as my invention is+ The combination, with the jack A,having pin E and bolt B, of the thill O and the spring D, having a largeloop extending over the thill, as shown, whereby the thill is presseddownward upon the bolt and is made capable of easy removal,substantially as described.

J. O. DIETRIOH.

In presence of--- (Ants. G. BALDWIN, LEWIs TOMLINSON.

